The external HD seems to be settling down now:

Cleanup...is essential for some 2017 content. When time began BIAB stored styles in the BB folder, that soon clutters the folder so a new folder Styles was created. Cleanup moves styles from BB to BB/Styles

Rebuilding StylePicker is essential,

TrackPicker option for Show RealTracks that are N/A helps a lot.

Options - What add-ons do I have? gives an overall install definition.